I'm worried 7.0 would be a resource hogger like 12.04 is for ubuntu. Either way I want to save every bit that I can because of memory limitations.
That pretty much goes against logic. Newer versions would likely be far better. It's just like saying you'd rather use Android 2 instead of Android 4. 4.3 is at least 6 times faster, smoother and more efficient than 2.0.